wx scroll bar

[Gandalf]

Hi every one. I'm not sure whether my framework is relevant so i will
mention it any way.
windows XP
python 2.5.2
wx 2.8 something...

I'm trying to scroll a panel element  and it doesn't work. (maybe this
function doesn't supposed to scroll element like this)

this is the relevant code:
wx.Frame.__init__(self, parent, id, title, size=(500, 400))
panel1=wx.Panel(self, -1, style=wx.SIMPLE_BORDER, size=(400, 460));
panel1.SetBackgroundColour('#cce8fa')
sw = wx.ScrolledWindow(panel1)

sw.SetScrollbars(20,20,55,40)

if any one know how should i do it I will be extremely  thankful

thanks!